Speed-changing device.



N0. 7|2,279. Patented Oct. 28, I902.

W. T. EMMES.

SPEED CHANGING DEVICE.

(Application filed July 10, 1902.) (No Model.) v 3 Sheets-Sheet l.

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. L, Witnesses: wiklwm II W Inventor M/T j, I b4 W w Bu M Attorney N0.7|2,279. Patented Oct. 28, I902.

' W. T. EMMES.

SPEED CHANGING DEVICE.

7 (Application filed July 10, 1902.)

(No Model.) 3 SheetsSheet 2.

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No. 712,279. Patented Oct. 28, I902.

- w. T. EMMES.

SPEED CHANGING DEVICE.

(Application filed July 10, 1902.) I (No Model.) 3 Sheets-Sheets,

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- UNITED STATES PATENT OFFICE.

WILLIAM T.'EMMES, OF CINCINNATI, OHIO.

SPEED-CHANGING DEVICE.

SPECIFICATION forming part of Letters Patent No. 712,279, dated'October28, 1902.

Application filed July 10,1902.

To all whom it may concern.-

Be' it known that I, WVILLIAM T. EMMES, a citizen of the United States,residing at Cincinnati, Hamilton county, Ohio, have invented certain newand useful Improvements in Speed-Changing Devices, of which thefollowing is a specification.

This invention,pertaining to improvements in speed-changing devices ofgeared type,will be readily understood from the following description,taken in connection with the accompanying drawings, in which Figure 1 isa diagrammatic side elevation of the isolated motion work of aspeed-changing device exemplifying my invention; Fig. 2, a diagrammaticplan of the same; Fig. 3, an end elevation of a complete exemplifyingmechanism embodying my invention; Fig. 4, avertical transverse sectionof the mechanism in the plane of line a ofFigs. 5 to 10, inclusive, themain supporting-frame to which the device is to be attached beingomitted; Fig. 5, a front elevation of the tumbler-gear portion of thedevice; Fig. 6, a sectional plan of the same in the plane of line b ofFigs. 3 and 4; Fig. 7, a front elevation of the sliding gear portion ofthe device; Fig. 8, a vertical longitudinal section of the same in theplane of line 0 of Figs. 3, 4, and 9; Fig. 9, a plan of the same; andFig. 10 a front elevation of the fixed frame parts, with the tumbler andall gearing omitted.

In the drawings, referring for the present exclusively to Figs. 1 and 2,1 indicates one of the terminal shafts of a pair, the same to be mountedin a suitable bearing and being herein termed the driving-shaft; 2,theother terminal shaft of the pair and herein termed the driven shaft, thesame being splined and disposed parallel with the driving-shaft and tobe mounted in suitable bearings; 3, a pinion on the driving-shaft; 4, anidle gear engaging pinion 3; 5, an idle pinion fast with gear 4; 6, anidle pinion engaging gear 4; 7,

an idle gear engaging pinion 5; 8, an angu larly-adjustable tumbler; 9,its axis of oscillation; 10, a detent forholding it in angularly vadjusted position; 11, an idle pinion loose on the axis of the tumblerand engaging pinion 6; 12, an idle pinion loose on the axis of thetumbler and engaging gear 7; 13, an idle pinion carried by the tumblerand engaging pin- SerialN0.114,983. (No model.)

ion 11; 14, an idle pinion carried by the tumbler and engaging-pinion12; 15, an idle pinion fast with pinion 14 and of lesser diameter; 16, agear splined on driven shaft 2 and adapted to be shifted into thevertical plane of either pinion 13, 14, or 15, and 17 a pinion fast withgear 16 and adapted by the sliding of the gear and pinion on thedriving-shaft to be brought into the vertical plane of either pinion 13or 14.

In Fig. 1 it will be observed that driven shaft 2 is disposed abovepinions 13, 14, and 15, so that by the upward adjustment of the tumblerany one of those pinions can be caused to engage with the driven gears,ac-

cording to whichof them has been longitudinally shifted to the plane ofthe selected tumbler-pinion to be engaged. 'In Fig. 2 the driven shaft,with its gear and pinion, has been diagrammatically displaced to theright in order to uncover the tumbler-gearing below it. Looking at Fig.2, it will be observed that members 4, 6, 11, and 13 constitute an idletransmitting train of gears from pinion 3, having no effect in modifyingspeed received from pinion 3 and ultimately transmitted from pinion 13,and it will be manifest that the size of the members referred to isimmaterial so far as speed conditions are concerned, their properengagement for purposes of transmission being the controlling element asto the size of these members. Assume pinion 3 and gear 16 to have anequal number of teeth and that gear 16 is shifted longitudinally intothe plane of and caused to engage with pinion 13. Under these conditionsthe gearing will effect no modification of speeds and the driven shaftwill run at the speed of the driving-shaft. Assume again that pinion 17had half as many teeth as pinion 3 and that pinion 17 is engaging withpinion 13. Under these conditions the driven shaft will turn at twicethe speed of the driving-shaft, the entire modification of speed beingeffected by pinions 3 and 17, members 4, 6, 11,

while an unmodifying idler under the conditions previously referred to,becomes a modifier in connection with the train deriving its motion frompinion 5. Pinion 5 and gear 4 together form acompound idler. The speedas modified by the compound idler becomes effective on tumbler-pinion14:, the consequence being that pinions 13 and 14 have different speeds.If now gear 16 be engaged with pinion 14, the driving-shaft will have amuch lower speed than was the case when gear 16 engaged with pinion 13,and, correspondingly, if pinion 17 be engaged with pinion 14 thedriving-shaft will have a much lower speed than was the case when pinion17 engaged with pinion 13. In this transmission of motion from pinion 5to the driven shaft the members 7, 12, and 14: constitute an unmodifyingtransmitting-train. While pinion 14 was an unmodifying idler under theconditions just named, it, in connection with pinion 15, forms acompound idler, serving to reduce the speed when pinion 15 becomesinvolved in the transmission. If gear 16 be engaged with pinion 15, thenthe driving-shaft will be given a much slower speed than under any ofthe previously-mentioned conditions. Five changes of speed for thedriven shaft are thus provided for with but two wheels upon it, and thesystem is such as to permit of a very useful series of speeds that is tosay, the system lends itself to a graduated series of selective speeds.While the illustration shows but two wheels on the driven shaft andthree idlers carried by the tumbler to drive those wheels, it ismanifest that the system will lend itself to any desired extension. Theinitial compound idler, formed by gear 4 and pinion 5, derives constantspeed from pinion 3, and it is manifest that this compound idler mightvery properly be viewed as the real driver of the system, pinion 3 beinga mere expedient for giving motion at constant speed to this compoundidler. WhileI have denominated shaft 1 as the driving-shaft, under whichcircumstances pinion 3 might be called the driving-pinion, I will referto the initial idler formed by gear L and pinion 5 as the compounddriving-gear.

I will now proceed to describe the exemplifying system ofsupporting-framing and the device for adjusting the Wheels that aresplined on the driven shaft.

Proceeding with the drawings, 18 indicates a main frame-plate, which maybe taken as typifying any suitable supporting-surface found or suppliedabout any machine in connection with which my speed-changing device isto be employedas, for instance, the outer end face of the head-stock ofan enginelathe, driving-shaft 1 and the supportingstud of compounddriving-gear t 5 finding their support in this frame-plate; 19, a doublehanger secured against the frame-plate and carrying the bearings fordriven shaft 2 at such distance apart as will permit the proper endwiseshifting of united wheels 16 and 17 upon the driving-shaft to bring theminto the proper planes of the tumbler-pinions; 20, a longitudinalguideway in the top of this hanger parallel with the driven shaft; 21, across-head sliding in this guideway and having rack-teethin its edge;22, a fork projecting. downwardly from this cross-head and straddlinggear 16, so that the shifting of the cross-head effects the shifting ofwheels 16 and 17 upon the driven shaft; 23, a coverplate secured to thetop of the hanger and roofing the guideway therein; 24, a handcrankjonrnaled in the cover-plate 25, a gear fast on the shaft of this crankand gearing with the cross-head, whereby the turning of the crank shiftsthe cross-head and the wheels of the driven shaft; 26, a spring-detentcarried by crank 24 and adapted to engage selective detent-holes in thecover-plate, and thus fix the wheels on the driven shaft in theirvarious positions of longitudinal adjustment; 27, a tumblerbearing-plate secured against the main frame-plate and adapted forswiveling motion thereon, with the axis 9 of the tumbler as the axis ofswiveling; 28, slots in plate 27 for the bolts uniting it to frameplate18, these slots permitting a limited swiveling motion of the plate aboutaxis 9; 29, a bracket reaching outwardly from tumbler bearing-plate 27and in conjunction with the bearing-plate supporting the axial stud 9 ofthe tumbler, which tumbler swings on that portion of the axial studexposed within the opening of the bracket 29; 30, hubs projecting fromeach face of the tumbler 8 concentric with its axis 9 and fittingbetween the supporting-bearings of the stud 9, pinion 11 turning freelyon one of these hubs and pinion 12 turning freely on the other one ofthem; 31, a cylindrical boss projecting from the rear face of thetumbler concentric with the common axis of pinions 13 and 14, pinion 13turning freely on this boss; 2, a stud passing through this boss andhaving a collar on its inner end to retain pinion 13 in its place, itsforward end projecting from the tumbler to furnish a journal on whichloosely turns united pinions 14 and 15, this stud having on its outerend a nut and washer to retain these pinions and the stud in place, and33 the supporting-stud of idle gear 7, the same being mounted in a slotin tumbler bearing-plate 27 and adjustable to a limited degree in an aresubstantially concentric with tumbler-axis 9.

The manner of adjustment of wheels 16 and 17 on the driving-shaft tobring a selected one of them into the plane of the selected one of thetumbler-pinions will be obvious from the construction, as will also bethe manner of angularly adjusting the tumbler to bring the selectedwheels into engagement. The tumbler being mounted in a structureindependent of the structure supporting the driven shaft and the onesupporting the initial gearing permits of relative adjustment or changein location to suit various sizes of gearin The mounting of the gearingdirectly engaging the tumbler-gears upon tumbler bearingplate 27 permitsof the tumbler and its adjuncts being constructed, assembled, andadjusted as a suborganization, and the adjustment of stud 33 in thetumbler bearing-plate permits of idle gear 7 being brought nicely intoproper engagement with pinion 5, it being observed that the tumbler-axiscalls for a certain accurate relationship with the'axis of pinion 6 andgear 7.

Shaft lhas been spoken of as the drivingshaft and shaft 2 as the drivensh aft; but it is manifest that the offices of these two shafts may betransposed, and the same consideration applies if instead of shaft 1being employed a shaft turning with the compound gear 4 5 be used.

I claim as my invention-- 1. In a speed-changing device, thecombination, substantially as set forth, of a compound driving-gear, anangularly-adjustable tumbler, an idle gear carried for adjustment by thetumbler, a compound idle gear carried for adjustment by thetumbler,independent trains of idle gears connecting said compound driving-gearwith the gears carried by the tumbler, a driven shaft, and a gear on thedriven shaft and mounted for longitudinal adjustment into the selectiveplane of gears carried by the tumbler.

2. In a speed-changing device, the combination, substantially as setforth, of a compound driving-gear, an angularly-adjustable tumbler, anidle gear carried for adjustment by the tumbler, a compound idle gearcarried for adjustment by the tumbler, independent trains of idle gearsconnecting said compound driving-gear with the gears carried by thetumbler, a driven shaft, and a plurality of gears on the driven shaftand mounted for longitudinal adjustment into the selective plane ofgears carried by the tumbler.

3. In a speed-changing device, the combination, substantially as setforth, of an angularlyadjustable tumbler, hubs projecting from thetumbler concentric with its axis, gears loose on said hubs, gearsengaging said gears and mounted free of the tumbler, a compoundgear'engaging the last-mentioned gears, idle gears carried by thetumbler and engaging the first-mentioned gears, and alongitudinally-adjustable gear mounted free of the tumbler and adaptedfor engagement selectively with said idle gears.

4. In a speed-changing device, the combination, substantially as setforth,-of an angularly adjustable tumbler, hubs projecting from thetumbler concentric with its axis, gears loose on said hubs, gearsengaging said gears and mounted free of the tumbler, a compound gearengaging the last mentioned gears, a boss projecting from the tumblereccentric to said hubs, an idle gear loose on said boss and engaging oneof the first-mentioned gears, a stud passing axially through said bossand projecting from the side of the tumbler opposite the boss, an idlegear mounted on the projection of said stud and engag ing the second oneof the first-mentioned gears, and a longitudinally-adjustable gearmounted free of the tumbler and adapted for engagement selectively withsaid idle gears.

5. In a speed-changing device, the combination, substantially as setforth, of a double bearing-bracket, a stud mounted in said bearings, atumbler mounted for angular adjustment on said stud between saidbearings, hubs projecting from the tumbler to the bearings andsurrounding the stud, central gears mounted to turn on said hubs, idletumblergears carried by the tumbler and engaging said central gears,alongitudinally-adj ustable gear mounted free of the tumbler and adaptedfor engagement selectively with said idle gears, idle gears mounted freeof the tumbler and engaging said central gears, and a compound gearengaging the last mentioned gears.

6. In a speed-changing device, the combination, substantially as setforth, of a tumbler-pivot, a tumbler bearing-plate mounted for angularadjustment on said pivot, a tumbler mounted for angular adjustment onsaid pivot, gears mounted on the tumbler, and gears 7 arranged forcooperation with said gears.

7. In a speed-changing device, the combination, substantially as setforth, of a tumbler-pivot, a tumbler bearing-plate mounted for angularadjustment on said pivot, a tumbler mounted for angular adjustment onsaid pivot, a gear mounted concentric with said pivot, a gear carried bythe tumbler and cooperating with said gear, a gear free of the tumblerand cooperating with said concentrically-mounted gear, and a gearcarried by said tumbler bearing-plate and engaging the first-mentionedgear.

8. In a speed-changing device, the combination, substantially as setforth, of a tumbler-pivot, a tumbler bearing-plate mounted forangularadjustment on said pivot, a tumbler mounted for angular adjustment onsaid ment on the tumbler bearing-plate and engaging the other one of thefirst-mentioned gears, and a compound gear engaging the two gearsmounted on the tumbler bearing-plate.

9. In a speed-changing. device, the combination, substantially as setforth, of a main frame-plate, a bracket mounted thereon, an

angularly-adjustable tumbler mounted in the bracket, a second bracketmounted on the frame-plate, a shaft j ournaled in the second bracketand'forming one terminal of the transmission system, a gear on saidshaft, gearing forming the other terminal of the transmission system,and cooperating gearing on the tumbler and frame-plate to serve asintermediate members of the transmissionsystem.

10. In a speed-changing device, the combination, substantially as setforth, of a main frame-plate, a bracket mounted adj ustably thereon, anangularly adjustable tumbler mounted in the bracket, a second bracketmounted on the frame-plate, a shaft journaled in the second bracket,gears carried by the tumbler and shaft, and gearing mounted free of thetumbler and cooperating; with the gears thereon.

11. In a speed-changing device, the combination, substantially as setforth, of a drivingpinion, a compound driving-gear engaged by saidpinion, an angularly-adj ustable tumbler,

lug-gear with the gears carried by the tum-- bler, a driven shaft, and agear on the driven shaft and mounted for longitudinal adjustment intothe selective plane of gears carried by the tumbler.

WILLIAM T. EMMES.

Witnesses:

MARTIN BRENNAN, WM. H. SOHWEIKERT.

